CN201116540Y

CN201116540Y - Fan blade

Info

Publication number: CN201116540Y
Application number: CNU2007201881990U
Authority: CN
Inventors: 张玲; 任志杰
Original assignee: Midea Group
Current assignee: Midea Group Co Ltd
Priority date: 2007-11-05
Filing date: 2007-11-05
Publication date: 2008-09-17
Anticipated expiration: 2017-11-05

Abstract

The utility model relates to a fan blade, including cylindrical impeller hub and the blade more than a slice, the line of each chord line mid point of above-mentioned blade of its characterized in that is curve L1, and the vertical line through blade central point O is L2, and L3 is the line of certain point on curve L1 and central point O, contained angle A between L2 and L3₁For the net bending angle of the blade, the connecting line passing through the root guide edge tangent point on the leeward side of the blade and the central point O is L4, and the included angle A between the tangent line L5 passing through a certain guide edge tangent point a on the leeward side of the blade and L4₂The angle is the leading edge bending angle, the radial included angle between the fan blade rotation plane and the hub is the blade installation angle Q, the ratio of the radius R of the hub to the maximum radius R of the blade is R/R of 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9 and 1.0, the net bending angle A of the blade is₁Corresponding to 0 degree, 3 degree, 5 degree, 7 degree, 9 degree, 11 degree, 13 degree, 15 degree, 17 degree and guide edge bending angle A₂The method comprises the following steps: 0 °, 3 °, 8 °, 11 °, 18 °, 25 °, 43 °, 65 °, 129 °, and the blade mounting angles Q are respectively 41 °, 35.5 °, 30.2 °, 23.5 °, 22.3 °, 20.2 °, 15.6 °, 12 °, 11 °. The utility model discloses owing to through preferred A₁、A₂And Q value, the purposes of improving air quantity and reducing noise can be achieved.

Description

A kind of fan fan blade

Technical field

The utility model is a kind of fan blade, particularly a kind of fan fan blade.

Background technique

At present, the part fan of selling on the market, there are problems such as the little and noise of air quantity is big in unreasonable because of fan blade design.

The model utility content

The purpose of this utility model aims to provide the fan fan blade that a kind of air quantity is big, noise is little, to overcome deficiency of the prior art.

A kind of fan fan blade by this purpose design, comprise centric leaf hub and a slice with upper blade, the line of wherein above-mentioned each mid-chord of blade is curve L1, and the vertical curve by blade central point 0 is L2, L3 is the line of last certain point of curve L1 with central point 0, the included angle A between L2 and the L 3 ₁Be the clean bending angle of blade, the line by blade lee face one lateral root portion guide margin point of contact and central point 0 is L4, by the tangent line L5 of a certain guide margin of blade lee face one side point of contact a and the included angle A of L4 ₂Be the guide margin bending angle, the radially angle of fan blade plane of rotation and leaf hub is blade angle Q, and leaf hub radius r is that r/R is 0.2,0.3,0.4,0.5 with the ratio of blade maximum radius R, 0.6,0.7,0.8,0.9, and 1.0 o'clock, the clean bending angle A of blade ₁Should be 0 ° mutually, 3 °, 5 °, 7 °, 9 °, 11 °, 13 °, 15 °, 17 °, guide margin bending angle A ₂Should be mutually: 0 °, 3 °, 8 °, 11 °, 18 °, 25 °, 43 °, 65 °, 129 °, blade angle Q should be 41 ° mutually, and 35.5 °, 30.2 °, 23.5 °, 22.3 °, 20.2 °, 15.6 °, 12 °, 11 °.

The utility model is because the clean bending angle A of blade ₁, guide margin bending angle A ₂The size of decision noise, blade angle Q works to the gas compression performance and promptly determines the size of air quantity, therefore, by preferred A ₁, A ₂, the Q value, not only can reach the purpose that improves air quantity but also reduce noise.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is the side-looking structural representation of Fig. 1.

Embodiment

Below in conjunction with drawings and Examples the utility model is described in further detail.

Referring to Fig. 1, this fan blade comprises centric leaf hub 1 and three uniform blades 2, three blades 2 and leaf hub 1 are injected into one, the line of above-mentioned blade 2 each mid-chord is curve L1, vertical curve by blade central point 0 is L2, L 3 is the line of last certain point of curve L1 with central point 0, the included angle A between L2 and the L3 ₁Be the clean bending angle of blade, the line by blade lee face one lateral root portion guide margin point of contact and central point 0 is L4, by the tangent line L5 of a certain guide margin of blade lee face one side point of contact a and the included angle A of L4 ₂Be the guide margin bending angle, the radially angle of fan blade plane of rotation and leaf hub is blade angle Q, and leaf hub 1 radius r is that r/R is 0.2,0.3,0.4,0.5 with the ratio of blade 2 maximum radius R, 0.6,0.7,0.8,0.9, and 1.0 o'clock, the clean bending angle A of blade ₁Should be 0 ° mutually, 3 °, 5 °, 7 °, 9 °, 11 °, 13 °, 15 °, 17 °, guide margin bending angle A ₂Should be mutually: 0 °, 3 °, 8 °, 11 °, 18 °, 25 °, 43 °, 65 °, 129 °, blade angle Q should be 41 ° mutually, and 35.5 °, 30.2 °, 23.5 °, 22.3 °, 20.2 °, 15.6 °, 12 °, 11 °.Because the clean bending angle A of blade ₁, guide margin bending angle A ₂The size of decision noise, blade angle Q works to the gas compression performance and promptly determines air quantity, the size of wind speed, therefore, by preferred A ₁, A ₂, the Q value, can reach and both improve air quantity, wind speed reduces the purpose of noise again.

Claims

1, a kind of fan fan blade, comprise centric leaf hub (1) and a slice with upper blade (2), it is characterized in that the line of each mid-chord of above-mentioned blade (2) is curve L1, the vertical curve by blade central point 0 is L2, L3 is the line of last certain point of curve L1 with central point 0, the included angle A between L2 and the L3 ₁Be the clean bending angle of blade, the line by blade lee face one lateral root portion guide margin point of contact and central point 0 is L4, by the tangent line L5 of a certain guide margin of blade lee face one side point of contact a and the included angle A of L4 ₂Be the guide margin bending angle, the radially angle of fan blade plane of rotation and leaf hub is blade angle Q, and leaf hub (1) radius r is that r/R is 0.2,0.3,0.4,0.5 with the ratio of blade maximum radius R, 0.6,0.7,0.8,0.9, and 1.0 o'clock, the clean bending angle A of blade ₁Should be 0 ° mutually, 3 °, 5 °, 7 °, 9 °, 11 °, 13 °, 15 °, 17 °, guide margin bending angle A ₂Should be mutually: 0 °, 3 °, 8 °, 11 °, 18 °, 25 °, 43 °, 65 °, 129 °, blade angle Q should be 41 ° mutually, and 35.5 °, 30.2 °, 23.5 °, 22.3 °, 20.2 °, 15.6 °, 12 °, 11 °.